ultrasound (Science: investigation) A type of imaging technique which uses high-frequency sound waves. This is highly operator-dependent and is thought to be useful in diagnosis but not particularly accurate in the assessment of tumour response. For the latter, CT or MR imaging are more accurate...
This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..
